水保所知识产出(1956---)知识库

Industrial wastewater discharge leads to serious eutrophication of water bodies, but most of the adsorbents are
difficult to selectively remove phosphorus and are difficult to use multiple times, therefore, developing an effi-
cient and reusable material for removal phosphate isextremelynecessary. In this work, a kind ofhighly selective
phosphate adsorbent, microporous carbon material (MCM), based on glucose was synthesized by hydrothermal
and activation method. The MCM were characterized by SEM, XPS, BET, element analysis, et al. The phosphate
adsorption mechanism of MCM were investigated by batch adsorption experiment and model calculation. Re-
sults showed that MCM had a high adsorption capacity for phosphate in a wide range of pH (1.5–10). Langmuir
model and pseudo-second-order kinetic revealed that the process was endothermic and involved both physical
and chemical adsorption. The main phosphate adsorption mechanisms of MCM are electrostatic attraction, ion
complexation, hydrogen bonding, and physical adsorption. The ions competition simulation experiment indi-
cated that the MCM was highly selective for phosphate removal. Furthermore, the phosphate adsorption tests
were carried out on five kinds of water, and the removal rates were all above 99.98%. The 20 regenerative cycles
experimentrevealedthattheMCM hadhighreusability.Therefore,this kindofnovelglucose-basedhighlyselec-
tive phosphate adsorbent with multi-cycle phosphorus removal performance can improve the eutrophication of
water.Thisstudyprovidesanewideaforphosphateremovalandexpandstheapplicationrangeofglucose-based
carbon materials.